Anonymous Posted on Apr 01, 2009

2000 Audi A6 2.8l Coolant Temp. gauge not working.

I just recently purchased a 2000 A6 2.8l and realized my temperature gauge hasn't moved.
The car just hit 100k.
If it is a sensor or switch - how easily can I replace this without shelling out a boat load to the dealership?

cris270 Apr 26, 2009

Yes. Got the same problem. Any suggestions?? Thanks.
Anonymous Apr 29, 2009

WELCOME TO THE CLUB, SEEMS LIOKE IT'S COMMON TO THIS MODEL

1 Answer

Colin Stickland

Audi Master 22,516 Answers
Posted on Aug 16, 2009

Colin Stickland

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Changing the engine sensor is easy when engine is cold and make sure you refill with antifreeze ,Buy sensor first so you know what to look for its not expensive from a motor factor .i honestly cant remember ever changing one on this model but it must be around the head area somewhere

William Cassels Oct 24, 2013

The problem is not with the sending sensor which is located in the coolant return hose from the radiator to the engine. The problem is somewhere in the instrument cluster, most likely a failing resistor on the circuit board. When the temperature is cold the temp guage will work normally, but soon drops back to no reading.
Colin Stickland Oct 24, 2013

Dont discount offhand what i said here ,use a multimeter to check the resistance of the sender when hot and then when cold before you start playing with dash head units ,this is mega money and it may be cheaper to change the car

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